zlarfx(3F)

NAME
     ZLARFX - applie a complex elementary reflector H to a complex m by n
     matrix C, from either the left or the right

SYNOPSIS
     SUBROUTINE ZLARFX( SIDE, M, N, V, TAU, C, LDC, WORK )

         CHARACTER      SIDE

         INTEGER        LDC, M, N

         COMPLEX*16     TAU

         COMPLEX*16     C( LDC, * ), V( * ), WORK( * )

PURPOSE
     ZLARFX applies a complex elementary reflector H to a complex m by n
     matrix C, from either the left or the right. H is represented in the form

           H = I - tau * v * v'

     where tau is a complex scalar and v is a complex vector.

     If tau = 0, then H is taken to be the unit matrix

     This version uses inline code if H has order < 11.


ARGUMENTS
     SIDE    (input) CHARACTER*1
             = 'L': form  H * C
             = 'R': form  C * H

     M       (input) INTEGER
             The number of rows of the matrix C.

     N       (input) INTEGER
             The number of columns of the matrix C.

     V       (input) COMPLEX*16 array, dimension (M) if SIDE = 'L'
             or (N) if SIDE = 'R' The vector v in the representation of H.

     TAU     (input) COMPLEX*16
             The value tau in the representation of H.

     C       (input/output) COMPLEX*16 array, dimension (LDC,N)
             On entry, the m by n matrix C.  On exit, C is overwritten by the
             matrix H * C if SIDE = 'L', or C * H if SIDE = 'R'.

     LDC     (input) INTEGER
             The leading dimension of the array C. LDA >= max(1,M).
     WORK    (workspace) COMPLEX*16 array, dimension (N) if SIDE = 'L'
             or (M) if SIDE = 'R' WORK is not referenced if H has order < 11.